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Small green circuit board with MCIO 38P connector and M.2 M-key slot, gold-plated contacts, black integrated circuits

Innocard

Innocard M.2 M-key PCIe Gen 4 ReDriver MCIO 38P gender changer

SKU CH-AJ4R-508QF

Converts MCIO 38P to M.2 PCIe 4.0 with integrated ReDriver, clock buffer and SMBus repeater for extended signal reach

  • Adapter typePCIe Gen4
  • Converts MCIO 38P to M.2 PCIe 4.0
  • ReDriver extends 16 GT/s differential signals
  • Clock buffer drives longer trace lengths and cable
  • SMBus repeater with voltage level shift supports hot swap
  • Compliant with SFF-TA-1016 Rev 1.0 and SFF-9402 1.1

MCIO 38P to M.2 PCIe 4.0 adapter

This Innocard adapter converts an MCIO 38P (SFF-TA-1016) interface to an M.2 M-key PCIe 4.0 slot with a built-in ReDriver. It targets server and HPC builders who need to connect an M.2 device to a system board that only exposes the MCIO 38P connector. The integrated 16 GT/s ReDriver and 100 MHz clock buffer maintain signal integrity over longer trace lengths and cables. It is not for users whose motherboards already provide a native M.2 slot or who require a different MCIO pin count.

Installation notes

The card installs by mating its MCIO 38P connector with the host connector and inserting an M.2 module into the M-key slot. Gold mating-area plating of 30 µin (0.76 µm) ensures durable contact. Common issues include forgetting to secure the M.2 module with the standoff screw, misaligning the keying notch, or exceeding the host platform’s power budget for the slot. Builders must also verify that their firmware supports hot-plug and side-band signals such as PERST#, WAKE#, CLKREQ# and PWRDIS through the bidirectional translators.

Deciding specification

The single specification that decides fit is the MCIO 38P (SFF-TA-1016) host connector paired with PCI Express 4.0 at 16 GT/s. If the system board presents a different MCIO pin count or only PCIe 3.0 signalling, this adapter will not function as intended. Compliance with SFF-9402 1.1 and PCIe M.2 Spec Rev 4.0 confirms the electrical interface, but the physical MCIO 38P connector remains the hard requirement.

How it compares

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Price $60.99
Pricier than about 90% of the 1,761 comparable items (median $18.99).

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Specifications

Product
Adapter typePCIe Gen4

Questions about this item

How can I verify the MCIO 38P to M.2 PCIe 4.0 conversion is working after installation?

The system should detect the connected M.2 device in BIOS or UEFI 2.3.1 and later, and the operating system (Windows 7, 8, 8.1, or 10) should enumerate it without errors, confirming the ReDriver and clock buffer are extending the 16GT/s signals correctly.

What connectors and components are included on the adapter, and what must I supply separately?

The board includes a built-in MCIO 38P connector with 30u gold plating, PCIe ReDriver, 100MHz clock buffer, SMBus repeater, and voltage-level translators for PERST#, WAKE#, CLKREQ#, and PWRDIS pins; you must provide the MCIO 38P cable and the M.2 M-key device.

Which specification version should I match when selecting this adapter for my server or accelerator build?

Choose this model when your design requires compliance with PCI Express Base Specification Rev 4.0, SFF-TA-1016 Rev 1.0, SFF-9402 Version 1.1, and PCI Express M.2 Spec Rev 4.0 Ver 1.0 for rack, tower, or high-performance computing applications.

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